Kendrick Lamar's To Pimp a Butterfly released ahead of schedule

Kendrick Lamar's new album has been released a week ahead of schedule.

The 27-year-old rapper had intended to unveil his third full-length album - 'To Pimp a Butterfly' - on March 23, but it appears to have been leaked early, against his wishes.

Kendrick tweeted last night (15.03.15): "Keep calm. All is well."

The platinum-selling star then tweeted the album's name and a link to iTunes, where fans can buy it online.

By contrast, Anthony Tiffith, CEO of Top Dawg Entertainment - which represents the rapper - was noticeably less philosophical about the album's early release, taking to Twitter to vent his frustration against the Interscope record label.